-69.44% is the change from 638 to 195
Calculation steps:
[( 195 - 638 ) ÷ 638] x 100 = -69.44%
Formula
Percentage change = [(195 - 638) / 638] x 100
Subtract the new number by the original number
195 - 638 = -443
-443 ÷ 638 = -0.6943573667711599
-0.6943573667711599 x 100 = -69.44%